Improvement in steam-traps



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NA PETERS, PHOTO-LITHOGRAPIIER WASHINGTON D C NITED STATES PATENTOFFICE.

L. W. WOODWARD, 0F NORTH ADAMS, MASSACHUSETTS.

IMPROVEMENT IN STEAM-TRAPS.

Specification forming part of Letters Patent No. 46,416, dated February14, 1865.

'to the accompanying drawings, forming part of this specification, inwhich- Figure lis an elevation of an axial longitudinal section ot' mysteam-trap. Fig. 2 is a cross-section taken through the waterescapeholes gh ofthe trap atthe moment when they coincide in position.

Similar letters of reference indicate like parts.'

This invention consists in a novel construction ot' steam-trap, in whichthe opening and closing thereofl is caused. by the alternate expansionand contraction of the pipe which forms the connection between the steamapparatus to be cleared ot' the water of vcondensation and the trap. i

A represents any support to which the receiver B may be secured. Thereceiver and the other parts of the trap are here shown to be placed invertical positions; but they can be placed in horizontal or inclinedpositions without impair-ing their efficiency.

The receiver B is an open cylinder with a screw-thread, C, tapped in itsupper end to receive a tube, F, which is rmly screwed down therein untilits ange K rests upon the upper end of the receiver, or as near theretoas its proper adjustment requires. The tube F extends beyond the llangeK, as seen at a', to receive a stuiing-box, D, of or dinaryconstruction. The tube Fis open at both ends, its lower end, b,extending within and nearly to the lower or opposite end tf thereceiver, and having at that end b a 1ongitudinal slot, j, as shown inFig. 1.

E is a steam-pipe connected with the steampipe S of an engine or anyother steam apparatus to which a steam-trap is to be applied. T'he. pipeE is passed into or through the tube F a distance equal to the length ofsaid tube, and has onone side, nearits end,a pin, z', which tits in theslotj of the tube. The end of said pipe E is closed, Abut its sides areperforated, on a line about midway ofthe length of the receiver, withnumerous holes, g,`which coincide, in certain positions the sides of thetube F. The joint formed bythe pipe E where it enters the neck c of thetube F is made tight by means of the stuft'- ing-box D. The receiver isto be connected at G, where a screw-thread is cut in its end, to a pipe,which shall carry oft' the water of condensation.

The operation of the apparatus is as follows: The receiver beingproperly secured in place, the tube F is adjusted therein so that theholes in the steam-pipe E shall coincide with the holes in the tube, theadjustment being made when the several parts are cold. When steam is gotup in the steam-pipes or appara-tus to which the pipe E is connected,the steam will lill the pipe E and cause it to expand by raising thetemperature ot' the metal, ant] its sides will move far enough withinthe tube F to take the holes g past the holes h, so as to prevent theescape ot' steam.

The trap is to be located in such a position as that any water ot'condensation produced in the pipe S and its connections will iiow intoand fill the lower end of the pipe F. Since the temperature of the saidpipe E w-ill length, and the said holes will again coincide, when thewater will escape into the receiver, and pass from thence into theconducting-pipe screwed into its end G. The longitudinal movements ofthe pipe E are guided, and the pipe and tube prevented from displacementby the rotation of either, by means ofthe pin and the slotj. i

This steam-trap is found in practice to be very efficient, and, as willbe perceived by lis not easily liable to derangement or displacement,either from accident or from the operation of natural causes-such asfrequent changes in temperature-nor is it liable to become easilyderanged from the presence therein or the passage through it of oil orother foreign substances.

I claim as new and desire to secure by Letters Patentl The steam-trapconstructed and operating substantially as above described.

L. W. WOODWARD.

Witnesses:

A.. W. RICHARDSON, CHARLES MUNN.

be lowered by means of the presence of the water of condensation, itwill contract in those skilled in the art to which it belongs, it

